Filtration rack



FIG. 1 is a front-side perspective view of a filtration rack showing my new design.

FIG. 2 is a front-side elevation view thereof.

FIG. 3 is a back-side elevation view thereof.

FIG. 4 is a top plan view thereof.

FIG. 5 is a bottom plan view thereof.

FIG. 6 is a right-side elevation view thereof; and,

FIG. 7 is a left-side elevation view thereof.

The broken lines in the drawings depict portions of the filtration rack that form no part of the claimed design. 

CLAIM The ornamental design for a filtration rack, as shown and described. 